Pneumatic control valve for ultralow-temperature environment

Abstract

The utility model discloses a pneumatic control valve used in an ultralow temperature environment, which belongs to the technical field of pneumatic control valves, and comprises a valve body, a buffer component is arranged on the outer wall of the valve body, the buffer component comprises a connecting plate, the connecting plate is fixedly connected to the outer wall of the valve body, a cavity is formed in the connecting plate, and the valve body is arranged in the cavity. The connecting plate is communicated with the valve body through the cavity, a sliding plate is slidably connected into the cavity, a buffering net is fixedly connected to the inner wall of the sliding plate, the top of the sliding plate is connected with the output end of the pneumatic telescopic rod, and a sealing plate is fixedly connected to the inner wall of the connecting plate. According to the pneumatic control valve used in the ultralow-temperature environment, by arranging the buffering assembly, the pneumatic control valve buffers water flow in the using process, so that the flow speed of the water flow is reduced, and the situation that the valve body is damaged due to the fact that the impact force of the water flow is large at the moment when the pneumatic control valve is opened is avoided; and therefore, the service life of the pneumatic control valve is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of pneumatic control valves, in particular to a pneumatic control valve used in an ultra-low temperature environment. Background Art

[0002] Pneumatic control valves refer to various pneumatic components that control the pressure, flow rate and flow direction of airflow in pneumatic systems and ensure the normal operation of pneumatic actuators or mechanisms. The structure of pneumatic control valves can be decomposed into two parts: the valve body (including the valve seat and valve hole, etc.) and the valve core. According to the relative position of the two, there are two types of pneumatic control valves: normally closed and normally open.

[0003] The Chinese patent has been published with the announcement number CN216158304U. It is proposed in the article that "a filter mechanism is arranged inside the pipe mouth at one end of the valve body, a filter screen is arranged inside the filter mechanism, and the upper and lower sides of the filter screen are movably connected with sliding rods, the outer parts of the two groups of sliding rods are slidably connected with sliding rails, the right side of the sliding rods is movably connected with a push rod, the lower end of the sliding rail is provided with a limit frame sleeved on the outside of the filter screen, and the outer part of the limit frame is movably connected with a trigger sensor". At the moment of opening and closing of the existing pneumatic control valve, due to the fast flow rate of the liquid, the impact force at the moment of opening the start control valve is relatively large. In the process of long-term impact on the valve body, the pneumatic control valve is easily damaged, thereby affecting its service life. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a pneumatic control valve for use in ultra-low temperature environments, which solves the problem that the existing pneumatic control valve has a large impact force at the moment of opening and closing due to the fast flow rate of the liquid. In the process of long-term impact on the valve body, the pneumatic control valve is easily damaged, thereby affecting its service life.

[0005] The technical solution of the utility model is as follows: a pneumatic control valve for ultra-low temperature environment, comprising a valve body, the outer wall of the valve body is provided with a buffer assembly, the buffer assembly comprises a connecting plate, the connecting plate is fixedly connected to the outer wall of the valve body, a cavity is defined in the connecting plate, the connecting plate is communicated with the valve body through the cavity, a slide plate is slidably connected in the cavity, a buffer net is fixedly connected to the inner wall of the slide plate, the top of the slide plate is connected to the output end of the pneumatic telescopic rod, a sealing plate is fixedly connected to the inner wall of the connecting plate, a mounting hole is defined in the sealing plate, the sealing plate is connected to the pneumatic telescopic rod through the mounting hole, and a sealing assembly is provided on the outer wall of the valve body.

[0006] As a further solution of the utility model: the outer wall of the pneumatic telescopic rod and the top of the sealing plate are fixedly connected with fixing rings, and the opposite ends of the two fixing rings are respectively connected to the two ends of a plurality of protection rods.

[0007] As a further solution of the utility model: a mounting piece is fixedly connected to one end of the valve body away from the connecting plate, a mounting groove is provided in the mounting piece, and the mounting piece is connected to the filter screen through the mounting groove.

[0008] As a further solution of the utility model: the sealing assembly includes a storage plate, the storage plate is fixedly connected to the outer wall of the valve body, and the inner wall of the storage plate is communicated with the inner wall of the valve body, the inner wall of the valve body is provided with a gate plate, the top of the gate plate is fixedly connected to the valve stem, and the shape of the gate plate is adapted to the shape of the storage plate.

[0009] As a further solution of the utility model: the top of the storage plate is connected to the bottom of the sleeve, the outer wall of the valve stem is connected to the inner wall of the connecting ring, the outer wall of the connecting ring is provided with a movable ring, a first sealing groove is opened in the movable ring, a first sealing ring is clamped in the first sealing groove, and the inner wall of the first sealing ring and the outer wall of the connecting ring are abutted against each other.

[0010] As a further solution of the utility model: a guide ring is arranged on the outer wall of the movable ring, a second sealing groove is opened at the top of the movable ring and the top of the guide ring, and a second sealing ring is clamped in the second sealing groove.

[0011] As a further solution of the utility model: a slide groove is provided in the sleeve, the inner wall of the slide groove is slidably connected to the outer wall of the guide ring, and the inner wall of the slide groove and the outer wall of the guide ring are both polished.

[0012] As a further solution of the utility model: a plurality of anti-collision rings are fixedly connected to the outer wall of the sleeve, the top of the sleeve is connected to the bottom of the driving mechanism body, and the top of the valve stem is connected to the output end of the driving mechanism body.

[0013] The working principle and beneficial effects of the utility model are:

[0014] 1. The pneumatic control valve used in ultra-low temperature environment is provided with a buffer component. When in use, water flows into the interior of the valve body through one end of the valve body and impacts the buffer net. The water flow is buffered by the buffer net. After the buffering is completed, the pneumatic telescopic rod is started to drive the slide plate to move along the cavity, thereby driving the buffer net to move upward, and the buffer net can be moved from the valve body into the connecting plate. The pneumatic control valve can buffer the water flow during use, thereby reducing the flow rate of the water flow, avoiding the situation where the valve body is damaged due to the large impact force of the water flow at the moment of opening the pneumatic control valve, thereby ensuring the service life of the pneumatic control valve.

[0015] 2. The pneumatic control valve used in ultra-low temperature environments is provided with a sealing component. When in use, the valve stem moves upward to drive the gate plate to move upward, and the gate plate can be moved into the storage plate, thereby opening the pneumatic control valve. When the valve stem moves upward, it will drive the connecting ring to move upward, and the connecting ring moves upward to drive the guide ring to move upward along the slide groove. Since the connecting ring and the moving ring are connected by a first sealing ring, and the moving ring and the guide ring are connected by a second sealing ring, the overall sealing of the sleeve is ensured, and the gap during the movement of the valve body causes external gas to flow into the valve body, which affects the normal operation of the valve body, thereby further ensuring the sealing of the pneumatic control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the valve body of the utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the buffer net of the utility model;

[0020] Figure 4 It is a three-dimensional structural diagram of the gate of the utility model;

[0021] Figure 5 It is a schematic diagram of the three-dimensional cross-sectional structure of the sleeve of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the explosion of the second sealing ring of the utility model;

[0023] In the figure: 1 valve body, 2 buffer assembly, 201 connecting plate, 202 cavity, 203 slide plate, 204 buffer net, 205 pneumatic telescopic rod, 206 sealing plate, 3 sealing assembly, 301 storage plate, 302 gate plate, 303 valve stem, 304 sleeve, 305 connecting ring, 306 moving ring, 307 first sealing groove, 308 first sealing ring, 309 guide ring, 3010 second sealing groove, 3011 second sealing ring, 3012 slide groove, 4 fixing ring, 5 protection rod, 6 mounting part, 7 filter net, 8 anti-collision ring, 9 driving mechanism body. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-6As shown, the utility model provides a technical solution: a pneumatic control valve for ultra-low temperature environment, including a valve body 1, the outer wall of the valve body 1 is provided with a buffer assembly 2, the buffer assembly 2 includes a connecting plate 201, the connecting plate 201 is fixedly connected to the outer wall of the valve body 1, a cavity 202 is provided in the connecting plate 201, the connecting plate 201 is connected with the valve body 1 through the cavity 202, a slide plate 203 is slidably connected in the cavity 202, a buffer net 204 is fixedly connected to the inner wall of the slide plate 203, the top of the slide plate 203 is connected to the output end of the pneumatic telescopic rod 205, the inner wall of the connecting plate 201 is fixedly connected with a sealing plate 206, a mounting hole is provided in the sealing plate 206, the sealing plate 206 is connected to the pneumatic telescopic rod 205 through the mounting hole, the valve body 1 The outer wall is provided with a sealing component 3, the outer wall of the pneumatic telescopic rod 205 and the top of the sealing plate 206 are fixedly connected with a fixing ring 4, and the opposite ends of the two fixing rings 4 are respectively connected to the two ends of a plurality of protective rods 5. By setting the protective rods 5, the pneumatic telescopic rod 205 can be protected. The end of the valve body 1 away from the connecting plate 201 is fixedly connected with a mounting member 6, and a mounting groove is provided in the mounting member 6. The mounting member 6 is connected to the filter screen 7 through the mounting groove. By setting the filter screen 7 and the mounting member 6, the water flow can be filtered, and the mounting member 6 can disassemble and clean the filter screen 7 to avoid clogging. The sealing component 3 includes a storage plate 301, which is fixedly connected to the outer wall of the valve body 1, and the inner wall of the storage plate 301 is connected to the valve body. 1 is connected, the inner wall of the valve body 1 is provided with a gate plate 302, the top of the gate plate 302 is fixedly connected with a valve stem 303, the shape of the gate plate 302 is adapted to the shape of the storage plate 301, the top of the storage plate 301 is connected to the bottom of the sleeve 304, the outer wall of the valve stem 303 is connected to the inner wall of the connecting ring 305, the outer wall of the connecting ring 305 is provided with a moving ring 306, the moving ring 306 is provided with a first sealing groove 307, the first sealing ring 308 is clamped in the first sealing groove 307, the inner wall of the first sealing ring 308 and the outer wall of the connecting ring 305 abut against each other, the outer wall of the moving ring 306 is provided with a guide ring 309, the top of the moving ring 306 and the top of the guide ring 309 are both provided with a second sealing groove 3010, the second sealing A second sealing ring 3011 is clamped in the groove 3010. By setting the sealing component 3, when in use, the valve stem 303 moves upward to drive the gate plate 302 to move upward, and the gate plate 302 can be moved into the storage plate 301, so as to open the pneumatic control valve, and when the valve stem 303 moves upward, it will drive the connecting ring 305 to move upward, and the connecting ring 305 moves upward to drive the guide ring 309 to move upward along the slide groove 3012. Since the connecting ring 305 and the moving ring 306 are connected by the first sealing ring 308, and the moving ring 306 and the guide ring 309 are connected by the second sealing ring 3011, the overall sealing of the sleeve 304 is guaranteed, and the external gas is prevented from flowing into the valve body 1 due to the gap during the movement of the valve body 1.The normal operation of the valve body 1 is affected, thereby further ensuring the sealing of the pneumatic control valve. A slide groove 3012 is provided in the sleeve 304. The inner wall of the slide groove 3012 is slidably connected to the outer wall of the guide ring 309. The inner wall of the slide groove 3012 and the outer wall of the guide ring 309 are polished. By polishing the slide groove 3012 and the guide ring 309, the friction generated during movement can be reduced to avoid movement jams. The outer wall of the sleeve 304 is fixedly connected with a plurality of anti-collision rings 8. The top of the sleeve 304 is connected to the bottom of the driving mechanism body 9, and the top of the valve stem 303 is connected to the output end of the driving mechanism body 9. By setting the anti-collision ring 8, it is possible to avoid the situation where external objects collide with the sleeve 304 and cause damage to its internal components.

[0026] The working principle of the utility model is:

[0027] When in use, water flows into the interior of the valve body 1 through one end of the valve body 1 and impacts the buffer net 204, and the water flow is buffered by the buffer net 204. After the buffering is completed, the pneumatic telescopic rod 205 is started to drive the slide plate 203 to move along the cavity 202, thereby driving the buffer net 204 to move upward, and the buffer net 204 can be moved from the valve body 1 into the connecting plate 201, and then the driving mechanism main body 9 is started to drive the valve stem 303 to move upward, and the valve stem 303 moves upward to drive the gate plate 302 to move upward, and the gate plate 302 can be moved to the storage plate 301, so as to open the pneumatic control valve, and when the valve stem 303 moves upward, it will drive the connecting ring 305 to move upward, and the connecting ring 305 moves upward to drive the guide ring 309 to move upward along the slide groove 3012, thereby ensuring the stability of the movement.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic control valve for use in ultra-low temperature environments, comprising a valve body (1), characterized in that: The outer wall of the valve body (1) is provided with a buffer assembly (2), and the buffer assembly (2) comprises a connecting plate (201), the connecting plate (201) is fixedly connected to the outer wall of the valve body (1), a cavity (202) is defined in the connecting plate (201), the connecting plate (201) is connected to the valve body (1) through the cavity (202), a slide plate (203) is slidably connected in the cavity (202), a buffer net (204) is fixedly connected to the inner wall of the slide plate (203), the top of the slide plate (203) is connected to the output end of the pneumatic telescopic rod (205), a sealing plate (206) is fixedly connected to the inner wall of the connecting plate (201), a mounting hole is defined in the sealing plate (206), and the sealing plate (206) is connected to the pneumatic telescopic rod (205) through the mounting hole, and the outer wall of the valve body (1) is provided with a sealing assembly (3).

2. A pneumatic control valve for use in ultra-low temperature environments according to claim 1, characterized in that: The outer wall of the pneumatic telescopic rod (205) and the top of the sealing plate (206) are both fixedly connected with a fixing ring (4), and the opposite ends of the two fixing rings (4) are respectively connected to the two ends of a plurality of protective rods (5).

3. The pneumatic control valve for ultra-low temperature environment according to claim 1, characterized in that: An end of the valve body (1) away from the connecting plate (201) is fixedly connected to a mounting member (6), a mounting groove is provided in the mounting member (6), and the mounting member (6) is connected to the filter screen (7) via the mounting groove.

4. The pneumatic control valve for ultra-low temperature environment according to claim 1, characterized in that: The sealing assembly (3) comprises a storage plate (301), the storage plate (301) being fixedly connected to the outer wall of the valve body (1), and the inner wall of the storage plate (301) being in communication with the inner wall of the valve body (1), the inner wall of the valve body (1) being provided with a gate plate (302), the top of the gate plate (302) being fixedly connected to a valve stem (303), and the shape of the gate plate (302) being adapted to the shape of the storage plate (301).

5. A pneumatic control valve for use in ultra-low temperature environments according to claim 4, characterized in that: The top of the storage plate (301) is connected to the bottom of the sleeve (304), the outer wall of the valve stem (303) is connected to the inner wall of the connecting ring (305), the outer wall of the connecting ring (305) is provided with a movable ring (306), a first sealing groove (307) is provided in the movable ring (306), a first sealing ring (308) is clamped in the first sealing groove (307), and the inner wall of the first sealing ring (308) and the outer wall of the connecting ring (305) are in contact with each other.

6. A pneumatic control valve for use in ultra-low temperature environments according to claim 5, characterized in that: The outer wall of the movable ring (306) is provided with a guide ring (309), the top of the movable ring (306) and the top of the guide ring (309) are both provided with a second sealing groove (3010), and a second sealing ring (3011) is clamped in the second sealing groove (3010).

7. A pneumatic control valve for use in ultra-low temperature environments according to claim 6, characterized in that: A sliding groove (3012) is provided in the sleeve (304), and the inner wall of the sliding groove (3012) is slidably connected to the outer wall of the guide ring (309), and the inner wall of the sliding groove (3012) and the outer wall of the guide ring (309) are both polished.

8. The pneumatic control valve for ultra-low temperature environment according to claim 5, characterized in that: A plurality of anti-collision rings (8) are fixedly connected to the outer wall of the sleeve (304), the top of the sleeve (304) is connected to the bottom of the driving mechanism body (9), and the top of the valve stem (303) is connected to the output end of the driving mechanism body (9).

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